Unit20 状语从句-薄冰实用英语语法详解

Unit(20 状语从句 20 状语从句概述 在复合句中作状语的从句,叫作状语从句( the adverbial clause)。状语从句由从属 连词或起连词作用的词语引出,用来修饰主句中的动词、形容词或副词。状语从句在句 中的位置较灵活,可位于句首、句末,也可位于句中。置于主句之前时,其后常加逗 号;置于主句之后,通常其前不加逗号;置于主句中间,从句前后均要加逗号与主句分 开。状语从句按其意义和作用可分为时间、地点、原因、条件、让步、目的、结果、方 式和比较等九种。 20→2回状语人句 常见的引导时间状语从句的从属连词有 since自从 while当……时,在……期间 before在……以前 after在 til/ until直到 once whenever任何时候 every time每当 no sooner.than………就…… as soon as /the moment / directly /immediately 就 hardly(scarcely).when when,as和 while ①when引出的时间状语从句,其中的动词既可以是表示延续性动作的动词,也可以是 表示瞬间性动作的动词。它的意义在于既可以表示主句的动作和从句的动作同时发生 又可以是从句的动作发生在主句的动作之前。如 When you apply for a job, you must present your credentials 当你申请工作时,你必须递交你的有关证件。(同时 When the students heard the teachers footsteps, they all stopped talking 352 B BING GRAMMAR 当学生们听到老师的脚步声时,他们都停止了讲话。(从句动作发生在前) ②when还可表示 just then“正在那时,突然”的意思,此时其所引导的从句只放在主 句之后。如 We were about to start when it began to rain.我们正要动身,突然天下起雨来 1. I left my umbrella in my room. Could you wait go back to get it? (南昌市中考题 A. when B. if C. while D. before 【答案选C】 while意思是“在……期间”,这句话的意思是:“在我回家取伞期间,你能等我吗?” 2. We were swimming in the lake suddenly the storm started 高考北京卷题 A. When B.讦f C. while D. before 【答案选A】when连词,作“正当这时”解 8as引导的时间状语从句,其动作是延续性的,而且侧重表示主句和从句的动作同时 发生。如 She came up as he was working.他正工作时,她走了进来。 s the students walked to their dormitories, they sang happily 学生们一边往宿舍走,一边快乐地唱着歌。 ④ while表示“在某一段时间里”或“在……期间”,其所引出的从句的动作是延续性 的,并侧重表示和主句的动作同时发生。如: While you were away, two persons came to see you.你不在时有两个人来找你 While the teacher paraphrased the text in English, the students listened atten tⅳ vely and took notes.当老师用英语阐释课文时,同学们注意地听并且做着笔记。 ⑤ while还可用作并列连词,相当于 whereas,连接一个表示对比的并列分句。如 Mary was dressed in blue while Jane was dressed in red 玛丽穿蓝色衣服,而珍妮穿红色衣服。 whenever, every time*A each time Whenever I 'm the only young people among all these older people, I feel out of t每当我一个年轻人与这些老人在一起时,我总感到很不自在。 Whenever/ Every time Each time I met her, she was studying 我每次看见她时,她总是在学习。 Every time he comes to Wuhan,hewi‖ call on me.他每次来武汉都要来看我。 1. Miss Zhao is very help